NDLI: Pseudomorphs of barite and biogenic ZnS after phyto-crystals of calcium oxalate (whewellite) in the peat layer of a poor fen

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Janeczek, Janusz Smieja-Król, Beata Wiedermann, Jerzy
Spatial Coverage	Poland
Description	Author Affiliation: Smieja-Król B ( Faculty of Earth Sciences, University of Silesia, Bedzinska 60, 41-200, Sosnowiec, Poland, beata.smieja-krol@us.edu.pl.)
Abstract	Pseudomorphs of barite (BaSO4) and Cd-rich ZnS after whewellite (CaC2O4·H2O) occur within remnants of Scots pine bark tissues in the peat layer of a poor fen located near a zinc smelter in south Poland. A two-step formation of the pseudomorphs is postulated based on SEM observations: (1) complete dissolution of whewellite, possibly caused by oxalotrophic bacteria, and (2) subsequent bacterially induced precipitation of barite and spheroidal aggregates of ZnS together with galena (PbS) in voids left by the dissolved whewellite crystals. Local increase in pH due to microbial degradation of whewellite, elevated concentrations of Zn(II) and Ba(II) in pore water due to the decomposition of atmospheric particles of sphalerite and barite in the acidic (pH 3.5-3.8) environment, oxidation of S species during drying and rewetting of the peat layer, and subsequent partial reduction of sulfate anions by sulfur-reducing bacteria were all factors likely involved in the crystallization of ZnS and barite in the microenvironment of the post-whewellite voids.
ISSN	09441344
e-ISSN	16147499
DOI	10.1007/s11356-014-2700-7
Journal	Environmental Science and Pollution Research
Issue Number	11
Volume Number	21
Language	English
Publisher	Springer
Publisher Date	2014-01-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Barium Sulfate Calcium Oxalate Metabolism Chemistry Sulfides Zinc Compounds Crystallization Hydrogen-ion Concentration Metallurgy Oxidation-reduction Soil Pollutants Sulfur-reducing Bacteria Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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